The AirTAC GFR300-15T AirTAC Filter Regulator, NPT1/2, 5 um is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT1/2" ports, a differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR300-15T is a filter regulator: water and particulate removal plus downstream pressure regulation in a single 300-size body. This configuration is threaded NPT1/2 (1/2 in), carries the optional 5 um filter element (W) instead of the 40 um standard, uses the differential-pressure drain that bleeds collected condensate automatically as flow passes through, and is the low-pressure (L) type for circuits set well below standard working pressures. A square pressure gauge scaled in MPa is fitted, the polycarbonate bowl suits the 300 frame, and the mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um elements, standard or low-pressure regulation, square or external round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR300-15T AirTAC Filter Regulator, NPT1/2, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure type |
| Adjusting mechanism | Balanced type |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Drain type | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, MPa scale |
| Reflux valve | Not fitted |
Specifications follow the official AirTAC G-series air-preparation data. The regulating band is set by the drain type: automatic and differential-pressure drains regulate 0.15 - 0.9 MPa, a manual drain regulates 0.05 - 0.9 MPa. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. Air must not freeze in the unit. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| 15 | Port size PT1/2". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
Field order is size, port, drain, type, bracket, gauge, shape, scale, grade, thread, reflux — a blank position takes the default. Example: GFR300-08 is a 300 body, PT1/4", differential drain, standard type, bracket included, gauge fitted, 40 µm, PT thread, no reflux valve.
A larger body carries a larger port and holds set pressure better as flow rises. AirTAC publishes flow only as curves, so size the body from your peak demand with headroom. The GFR600 uses an aluminium-alloy bowl; the 200, 300 and 400 bodies use PC.
| This model | GFR300 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
On a low-pressure clamping or workholding circuit, this unit filters the shop air to 5 um and holds a reduced, stable supply pressure to the clamping cylinders, with the MPa gauge giving operators a direct setpoint readout.
Packaging machines running air cylinders, grippers and vacuum-assist ejectors benefit from one body that removes water and fine particles and regulates supply pressure, with the differential-pressure drain handling condensate during continuous running.
CNC tool changers, chip blow-off and spindle-air-seal circuits need clean, regulated air at modest pressures; the low-pressure type and 5 um element protect the valves and seals, and the included bracket mounts the unit at the machine.
Size the unit by the flow your line needs: step up from 300 to 400 or 600 for larger ports and more air, or down to 200 for compact circuits. Choose the 5 um element (this model, code W) where downstream valves and cylinders need finer filtration, or the 40 um standard for general protection. The differential-pressure drain on this unit suits steady-flow lines; pick the automatic drain for intermittent flow or unattended duty, or the manual drain where an operator drains the bowl routinely. As a low-pressure (L) type this regulator is intended for circuits set well below standard working pressures - confirm the exact range with us before ordering. The fitted square gauge reads in MPa; psi and bar scales and an external round gauge are alternatives. PT is the standard thread, with G and NPT as order options, and the bracket is included.
Because AirTAC publishes flow as curves rather than a single rated figure, ask us to confirm sizing against your application before ordering.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as curves, not as a single rated number, so we do not quote a figure here. Tell us your line pressure, set pressure and air consumption and we will confirm the flow from the datasheet curves and check the 300 size is right for your application.
The differential-pressure drain is the default: it bleeds condensate from the bowl automatically as air flows through, which suits continuously running lines. If your flow is intermittent or the unit runs unattended, the automatic drain (code A) is the better choice; if an operator can drain the bowl routinely, the manual drain (code M) is available. All three are catalogue options on the GFR300.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity, thread type (PT / G / NPT), gauge scale and destination. We confirm price, availability and lead time — usually within 7-8 hours.